/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.apache.jena.util.iterator.test;

/**
    test the WrappedIterator class. TODO: test _remove_, which means having
    some fake base iterator to do the checking, and _close_, ditto.
*/

import java.util.*;

import junit.framework.*;
import org.apache.jena.graph.*;
import org.apache.jena.graph.test.GraphTestBase;
import org.apache.jena.util.iterator.*;

public class TestWrappedIterator extends GraphTestBase {
    public static TestSuite suite() {
        return new TestSuite(TestWrappedIterator.class);
    }

    public TestWrappedIterator(String name) {
        super(name);
    }

    public void testWrappedIterator() {
        Iterator<String> i = Arrays.asList(new String[]{"bill", "and", "ben"}).iterator();
        ExtendedIterator<String> e = WrappedIterator.create(i);
        assertTrue("wrapper has at least one element", e.hasNext());
        assertEquals("", "bill", e.next());
        assertTrue("wrapper has at least two elements", e.hasNext());
        assertEquals("", "and", e.next());
        assertTrue("wrapper has at least three elements", e.hasNext());
        assertEquals("", "ben", e.next());
        assertFalse("wrapper is now empty", e.hasNext());
    }

    public void testUnwrapExtendedIterator() {
        ExtendedIterator<Triple> i = graphWith("a R b").find(Triple.ANY);
        assertSame(i, WrappedIterator.create(i));
    }

    public void testWrappedNoRemove() {
        Iterator<Node> base = nodeSet("a b c").iterator();
        base.next();
        base.remove();
        ExtendedIterator<Node> wrapped = WrappedIterator.createNoRemove(base);
        wrapped.next();
        try {
            wrapped.remove();
            fail("wrapped-no-remove iterator should deny .remove()");
        } catch (UnsupportedOperationException e) {
            pass();
        }
    }
}
